Rational.
20 squared is 400 which is a rational number
Sometimes. eg the irrational number √2 squared is 2 which is rational (2 = 2/1) eg the irrational number √(√2) squared is √2 which is irrational.
A rational number can be expressed as a fraction whereas an irrational number can't be expressed as a fraction.
It is a rational number as 9
Any number that can be written as a fraction is rational -- therefore, 4/9 squared is rational (it can still be written as a fraction even if you multiply it by itself).
28 squared is 784 which is a rational number
Rational.
Rational.
20 squared is 400 which is a rational number
Sometimes. eg the irrational number √2 squared is 2 which is rational (2 = 2/1) eg the irrational number √(√2) squared is √2 which is irrational.
Well, isn't that a happy little question! 0.21 is a rational number because it can be expressed as a fraction, specifically 21/100. Just like painting a beautiful landscape, math can be a lovely and calming experience once you understand its gentle rhythms.
-6.3 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
A rational number can be expressed as a fraction whereas an irrational number can't be expressed as a fraction.
It is a rational number as 9
If it can be expressed as a fraction then it is rational if not then it is irrational
Rational; 62 = 36. Any rational number that is squared is still rational.